from django.shortcuts import render, redirect
from django.views import View
from django import http
import re
from django.contrib.auth import login, logout,authenticate
from meiduo_mall.utils.response_code import RETCODE
from django_redis import get_redis_connection
from django.conf import settings
from django.contrib.auth.mixins import LoginRequiredMixin
from django.contrib.auth.decorators import login_required
from django.utils.decorators import method_decorator
from meiduo_mall.utils.views import LoginRequiredView
import json
from django.core.mail import send_mail
from django.db import DatabaseError

from .models import User, Address
from celery_tasks.email.tasks import send_verify_email
from .utils import get_user_check_token,generate_verify_email_url
import logging
from goods.models import SKU
from carts.utils import merge_cart_cookie_to_redis

logger = logging.getLogger()

# Create your views here.

class RegisterView(View):


    def get(self, request):
        return render(request, 'register.html')

    def post(self, request):

        query_dict = request.POST
        username = query_dict.get('username')
        password = query_dict.get('password')
        password2 = query_dict.get('password2')
        mobile = query_dict.get('mobile')
        sms_code = query_dict.get('sms_code')
        allow = query_dict.get('allow')

        if all([username, password, password2, mobile, sms_code, allow]) is False:
            return http.HttpResponseForbidden('缺少必传参数')

        if not re.match(r'^[a-zA-Z0-9_-]{5,20}$', username):
            return http.HttpResponseForbidden('请输入5-20个字符的用户名')
        if not re.match(r'^[0-9A-Za-z]{8,20}$', password):
            return http.HttpResponseForbidden('请输入8-20个的密码')
        if password != password2:
            return http.HttpResponseForbidden('输入两次密码不一致')
        if not re.match(r'^1[[345789]\d{9}$', mobile):
            return http.HttpResponseForbidden('请输入正确的手机号')

        redis_conn = get_redis_connection('verify_codes')
        sms_code_server_bytes = redis_conn.get('sms_%s' % mobile)

        if sms_code_server_bytes is None:
            return http.JsonResponse({'code': RETCODE.SMSCODERR, 'errmsg': '短信验证码已过期'})

        redis_conn.delete('sms_%s' % mobile)

        sms_code_server = sms_code_server_bytes.decode()
        if sms_code != sms_code_server:
            return http.JsonResponse({'code': RETCODE.SMSCODERR, 'errmsg': '短信验证码填写错误'})

        # user = User.objects.create(
        #     username = username,
        #     password = password
        # )
        # user.set_password(password)
        # user.save()

        user = User.objects.create_user(username=username, password=password, mobile=mobile)

        # request.session['id'] = user.id
        # user_id = request.session['id']
        login(request, user)
        response = redirect('/')
        response.set_cookie('username', user.username, max_age= settings.SESSION_COOKIE_AGE)

        # return http.HttpResponse('注册成功,应该去到首页!')
        return response

class UsernameCountView(View):

    def get(self, request, username):

        count = User.objects.filter(username=username).count()

        data = {
            'count': count,
            'code':RETCODE.OK,
            'errmsg':'OK'
        }

        return http.JsonResponse(data)

class MobileCountView(View):

    def get(self, request, mobile):

        count = User.objects.filter(mobile=mobile).count()

        data = {
            'count': count,
            'code':RETCODE.OK,
            'errmsg':'OK'
        }

        return http.JsonResponse(data)


class LoginView(View):

    def get(self, request):
        return render(request, 'login.html')

    def post(self, request):

        # 接收表单数据
        query_dict = request.POST
        print(query_dict.dict().keys())
        username = query_dict.get('username')
        password = query_dict.get('password')
        remembered = query_dict.get('remembered')

        # 校验
        if all([username, password]) is False:
            return http.HttpResponseForbidden('缺少必传参数')

        # 登陆验证
        user = authenticate(request, username=username, password=password)
        # if 如果是手机号登陆:
        #     user = User.objects.get(mobile=username)
        # elif 如果是邮箱登陆:
        #     user = User.objects.get(email=username)
        # else:
        #     user = User.objects.get(username=username)

        # user = User.objects.get(email=username)
        # user.check_password(password)

        # 判断用户是否通过身份认证
        if user is None:
            return render(request, 'login.html', {'account_errmsg': '用户名或者密码错误'})

        # 状态保持
        login(request, user)
        # if remembered is None:
        #     request.session.set_expiry(0)
        # else:
        #     request.session.set_expiry(3600 * 24 * 7)

        # request.session.set_expiry(0 if remembered is None else (3600 * 24 * 7))
        request.session.set_expiry(None if remembered else 0)

        next = request.GET.get('next')
        response = redirect(next or '/')
        # response.set_cookie('username', user.username, max_age=None if remembered is None else settings.SESSION_COOKIE_AGE)
        response.set_cookie('username', user.username, max_age=remembered and settings.SESSION_COOKIE_AGE)

        # 重定向到首页
        # return http.HttpResponse('登陆成功，跳转到首页界面')
        
        merge_cart_cookie_to_redis(request, response)

        return response

class LogoutView(View):

    def get(self, request):

        logout(request)

        response = redirect('users:login')
        response.delete_cookie('username')

        return response

# class InfoView(View):
#
#     def get(self, request):
#         user = request.user
#         if user.is_authenticated:
#             return render(request, 'user_center_info.html')
#         else:
#             return redirect('/login/?next=/info/')

class InfoView(LoginRequiredMixin, View):

    def get(self, request):

        return render(request, 'user_center_info.html')

# @method_decorator(login_required, name='get')
# class InfoView(LoginRequiredMixin, View):
#
#     def get(self, request):
#         return render(request, 'user_center_info.html')

class EmailView(LoginRequiredView):

    def put(self, request):
        json_dict = json.loads(request.body.decode())
        email = json_dict.get('email')

        if not re.match(r'^[a-z0-9][\w\.\-]*@[a-z0-9\-]+(\.[a-z]{2,5}){1,2}$', email):
            return http.HttpResponseForbidden('邮箱格式有误')

        user = request.user
        if user.email != email:
            user.email = email
            user.save()

        # html_message = '<p>这是一个激活邮件<a href="http://www.baidu.com">点我一下<a></p>'
        # send_mail(subject='激活邮箱', message='普通文本', from_email='美多商城<itcast99@163.com>', recipient_list=[email],html_message=html_message)

        # verify_url = 'http://www.baidu.com'
        verify_url = generate_verify_email_url(user)
        send_verify_email.delay(email, verify_url)

        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '添加邮箱成功'})

class EmailVerifyView(View):

    def get(self, request):
        token = request.GET.get('token')

        user = get_user_check_token(token)

        if user is None:
            return http.HttpResponseForbidden('邮箱激活失败')

        user.email_active = True
        user.save()

        return render(request, 'user_center_info.html')


class AddressesView(LoginRequiredView):

    def get(self, request):

        user = request.user
        address_qs = Address.objects.filter(user = user, is_deleted=False)
        # user.addresses.filter(is_deleted = False)
        address_list = []
        for address in address_qs:
            address_list.append({
                'id': address.id,
                'title': address.title,
                'receiver': address.receiver,
                'province_id': address.province_id,
                'province': address.province.name,
                'city_id': address.city_id,
                'city': address.city.name,
                'district_id': address.district_id,
                'district': address.district.name,
                'place': address.place,
                'mobile': address.mobile,
                'tel': address.tel,
                'email': address.email
            })

        content = {
            'addresses': address_list,
            'default_address_id': user.default_address_id
        }

        return render(request, 'user_center_site.html', content)


class AddressCreateView(LoginRequiredView):

    def post(self, request):
        json_dict = json.loads(request.body.decode())
        title = json_dict.get('title')
        receiver = json_dict.get('receiver')
        province_id = json_dict.get('province_id')
        city_id = json_dict.get('city_id')
        district_id = json_dict.get('district_id')
        place = json_dict.get('place')
        mobile = json_dict.get('mobile')
        tel = json_dict.get('tel')
        email = json_dict.get('email')

        if all([title, receiver, province_id, city_id, district_id, place, mobile]) is False:
            return http.HttpResponseForbidden('缺少必传参数')
        if not re.match(r'^1[3-9]\d{9}$', mobile):
            return http.HttpResponseForbidden('手机号格式有误')
        if tel:
            if not re.match(r'^(0[0-9]{2,3}-)?([2-9][0-9]{6,7})+(-[0-9]{1,4})?$', tel):
                return http.HttpResponseForbidden('参数tel有误')

        if email:
            if not re.match(r'^[a-z0-9][\w\.\-]*@[a-z0-9\-]+(\.[a-z]{2,5}){1,2}$', email):
                return http.HttpResponseForbidden('参数email有误')


        user = request.user
        try:
            address = Address.objects.create(
                user=user,
                title=title,
                receiver=receiver,
                province_id=province_id,
                city_id=city_id,
                district_id=district_id,
                place=place,
                mobile=mobile,
                tel=tel,
                email=email
            )
        except DatabaseError as e:
            logger.error(e)
            return http.HttpResponseForbidden('新增收获地址有误')

        if user.default_address is None:
            user.default_address = address
            # user.default_address_id = address.id
            user.save()

        address_dict = {
            'id': address.id,
            'title': address.title,
            'receiver': address.receiver,
            'province_id': address.province_id,
            'province': address.province.name,
            'city_id': address.city_id,
            'city': address.city.name,
            'district_id': address.district_id,
            'district': address.district.name,
            'place': address.place,
            'mobile': address.mobile,
            'tel': address.tel,
            'email': address.email
        }
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '新增收货地址成功', 'address': address_dict})


class UpdateDestroyAddressView(LoginRequiredView):

    def put(self, request, address_id):

        user = request.user
        try:
            address = Address.objects.get(id=address_id, user=user, is_deleted=False)
        except Address.DoesNotExist:
            return http.HttpResponseForbidden('address_id有误')

        json_dict = json.loads(request.body.decode())
        title = json_dict.get('title')
        receiver = json_dict.get('receiver')
        province_id = json_dict.get('province_id')
        city_id = json_dict.get('city_id')
        district_id = json_dict.get('district_id')
        place = json_dict.get('place')
        mobile = json_dict.get('mobile')
        tel = json_dict.get('tel')
        email = json_dict.get('email')

        if all([title, receiver, province_id, city_id, district_id, place, mobile]) is False:
            return http.HttpResponseForbidden('缺少必传参数')
        if not re.match(r'^1[3-9]\d{9}$', mobile):
            return http.HttpResponseForbidden('手机号格式有误')
        if tel:
            if not re.match(r'^(0[0-9]{2,3}-)?([2-9][0-9]{6,7})+(-[0-9]{1,4})?$', tel):
                return http.HttpResponseForbidden('参数tel有误')

        if email:
            if not re.match(r'^[a-z0-9][\w\.\-]*@[a-z0-9\-]+(\.[a-z]{2,5}){1,2}$', email):
                return http.HttpResponseForbidden('参数email有误')

        # try:
        #     address = Address.objects.create(
        #         user=user,
        #         title=title,
        #         receiver=receive,
        #         province_id=province_id,
        #         city_id=city_id,
        #         district_id=district_id,
        #         place=place,
        #         mobile=mobile,
        #         tel=tel,
        #         email=email
        #     )
        # except DatabaseError as e:
        #     logger.error(e)
        #     return http.HttpResponseForbidden('新增收获地址有误')

        address.title = title
        address.receiver = receiver
        address.province_id = province_id
        address.city_id = city_id
        address.district_id = district_id
        address.place = place
        address.mobile = mobile
        address.tel = tel
        address.email = email
        address.save()

        address_dict = {
            'id': address.id,
            'title': address.title,
            'receiver': address.receiver,
            'province_id': address.province_id,
            'province': address.province.name,
            'city_id': address.city_id,
            'city': address.city.name,
            'district_id': address.district_id,
            'district': address.district.name,
            'place': address.place,
            'mobile': address.mobile,
            'tel': address.tel,
            'email': address.email
        }
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '修改收货地址成功', 'address': address_dict})

    def delete(self, request, address_id):
        user = request.user
        try:
            address = Address.objects.get(id=address_id, user = user, is_deleted=False)
        except Address.DoesNotExist:
            return http.HttpResponseForbidden('address_id有误')
        address.address_id = True
        address.save()

        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '删除收货地址成功'})

class UpdateAddressTitleView(LoginRequiredView):

    def put(self, request, address_id):
        user = request.user
        try:
            address = Address.objects.get(id=address_id, user=user, is_deleted=False)
        except Address.DoesNotExist:
            return http.HttpResponseForbidden('address_id有误')

        json_dict = json.loads(request.body.decode())
        title = json_dict.get('title')

        if title is None:
            return http.HttpResponseForbidden('缺少title')

        address.title = title
        address.save()

        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '修改地址标题成功'})

class UserDefaultAddressView(LoginRequiredView):

    def put(self, request, address_id):
        user = request.user
        try:
            address = Address.objects.get(id=address_id, user=user, is_deleted=False)
        except Address.DoesNotExist:
            return http.HttpResponseForbidden('address_id有误')

        address.default_address = address
        address.save()

        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '设置默认地址成功'})


class ChangeUserPasswordView(LoginRequiredView):

    def get(self, request):
        return render(request, 'user_center_pass.html')

    def post(self, request):

        query_dict = request.POST
        old_pwd = query_dict.get('old_pwd')
        new_pwd = query_dict.get('new_pwd')
        new_cpwd = query_dict.get('new_cpwd')

        if all([new_pwd, new_pwd, new_cpwd]) is False:
            return http.HttpResponseForbidden('缺少必传参数')

        user = request.user
        if user.check_password(old_pwd) is False:
            return render(request, 'user_center_pass.html', {'origin_pwd_errmsg': '原始密码有误'})

        if not re.match(r'^[0-9A-Za-z]{8,20}$', new_pwd):
            return http.HttpResponseForbidden('密码最少8位，最长20位')
        if new_pwd != new_cpwd:
            return http.HttpResponseForbidden('两次输入的密码不一致')

        user.set_password(new_pwd)
        user.save()

        # return redirect('/logout/')
        logout(request)
        response = redirect('/login/')
        response.delete_cookie('username')

        return response


class UserBrowseHistory(View):

    def post(self, request):

        user = request.user
        if not user.is_authenticated:
            return http.JsonResponse({'code': RETCODE.SESSIONERR, 'errmsg': '未登陆用户不能添加浏览记录'})
        json_dict = json.loads(request.body.decode())
        sku_id = json_dict.get('sku_id')

        try:
            sku_model = SKU.objects.get(id = sku_id, is_launched=True)
        except SKU.DoesNotExist:
            return http.HttpResponseForbidden('sku_id不存在')

        redis_conn = get_redis_connection(('history'))

        key = 'history_%s' % user.id

        pl = redis_conn.pipeline()
        pl.lrem(key, 0, sku_id)

        pl.lpush(key, sku_id)
        pl.ltrim(key, 0, 4)
        pl.execute()

        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': 'OK'})

    def get(self, request):

        user = request.user
        if not user.is_authenticated:
            return http.JsonResponse({'code': RETCODE.SESSIONERR, 'errmsg': '未登陆用户没有商品浏览记录'})

        redis_conn = get_redis_connection('history')

        sku_ids = redis_conn.lrange('history_%s' % user.id, 0, -1)
        # sku_qs = SKU.objects.filter(id__in=[1, 2]) 此种写法浏览记录顺序就乱了
        sku_list = []
        for sku_id in sku_ids:
            sku_model = SKU.objects.get(id=sku_id)
            sku_list.append({
                'id': sku_model.id,
                'default_image_url': sku_model.default_image.url,
                'name': sku_model.name,
                'price': sku_model.price
            })

        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': 'OK', 'skus': sku_list})




class FindPasswordView(View):
    """忘记密码"""

    def get(self, request):
        return render(request, 'find_password.html')
        # return render(request,'find_password.html',{'image_bytes':image_bytes})


class FindPasswordSecondView(View):
    """第二bu"""
    def get(self, request, account):
        # 获取表单数据
        uuid = request.GET.get('image_code_id')
        image_code = request.GET.get('text')
        # 多账号获取用户
        user = get_user_by_account(account)

        if all([uuid, image_code]) is False:
            return http.HttpResponseForbidden('缺少必要参数!')

        if user is None:
            return http.HttpResponseForbidden('此用户不存在')

        # 创建redis连接对象
        redis_conn = get_redis_connection('verify_codes')

        # 获取redis数据库中当前用户图形验证码

        image_code_server_bytes = redis_conn.get(uuid)

        # 删除已经取出的图形验证码,让它只能被用一次

        redis_conn.delete(uuid)

        # 判断redis中图形验证码过期
        if image_code_server_bytes == None:
            return http.JsonResponse({'code': RETCODE.IMAGECODEERR, 'errmsg': '验证码过期'})

        # 将bytes类型转换为字符串类型
        image_code_server = image_code_server_bytes.decode()
        print(image_code_server)
        # 用户填写的和redis中的图形验证码是否一致(注意大小问题)
        if image_code.lower() != image_code_server.lower():
            return http.HttpResponseForbidden('图形验证码错误')
            # return http.JsonResponse({'code': 400, 'errmsg': '验证码错误!'})

        # access_token = get_user_check_token(user.id)
        serializer = Serializer(secret_key=settings.SECRET_KEY, expires_in=3600 * 24)
        data = {'user_id': user.id}

        # 3.加密 decode()
        access_token = serializer.dumps(data).decode()
        #
        # context = {
        #     'mobile': user.mobile,
        #     'access_token': access_token
        # }
        return http.JsonResponse(
            {'code': RETCODE.OK, 'errmsg': 'OK', 'mobile': user.mobile, 'access_token': access_token})

class FindPasswordSMSView(View):
    """发送短信验证码"""
    def get(self, request):

        access_token = request.GET.get('access_token')
        serializer = Serializer(secret_key=settings.SECRET_KEY, expires_in=3600 * 24)

        data = serializer.loads(access_token)
        user_id = data.get('user_id')

        # 校验

        try:
            user = Users.objects.get(id=user_id)
        except Users.DoesNotExist:
            return http.HttpResponseForbidden('模型不存在')

        if all([user_id]) is False:
            return http.HttpResponseForbidden('缺少必要参数')

        mobile = user.mobile

        # 创建redis连接对象
        redis_conn = get_redis_connection('verify_codes')
        # 来发短信之前先尝试性的去redis中获取此手机号60s内是否发送过短信
        send_flag = redis_conn.get('send_flag_%s' % mobile)
        # 判断是否有发送过的标记
        if send_flag:
            return http.JsonResponse({"code": RETCODE.THROTTLINGERR, 'errmsg': '短信发送频繁'})

        # 随机生成一个6位数字作为短信验证码
        sms_code = '%06d' % randint(0, 99999)
        logging.error(sms_code)
        # 管道技术
        # 创建管道
        pl = redis_conn.pipeline()
        # 将短信验证码存储到redis 以备后期注册时进行验证
        pl.setex('sms_%s' % mobile, 300, sms_code)
        # redis_conn.setex('sms_%s' % mobile, constants.SMS_CODE_EXPIRE, sms_code)  # 魔法数字

        # 向redis存储一个标识,标记此手机号60s内已经发过短信
        pl.setex('send_flag_%s' % mobile, 60, 1)
        # redis_conn.setex('send_flag_%s' % mobile, 60, '1')

        # 执行管道
        pl.execute()
        # 利用容联云平台发短信
        # CCP().send_template_sms('接收短信手机号', ['短信验证码', '提示用户短信验证码多久过期单位分钟'], '模板id')
        # CCP().send_template_sms(mobile,[sms_code, constants.SMS_CODE_REST],'1')
        # 响应
        tasks.send_sms_code.delay(mobile, sms_code)
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': 'OK'})


class EditPasswordView(View):
    def get(self, request, username):

        # 接收sms_code
        sms_code = request.GET.get('sms_code')

        try:
            user = Users.objects.get(username=username)
        except Users.DoesNotExist:
            return http.HttpResponseForbidden('模型不存在')

        # 校验
        redis_conn = get_redis_connection('verify_codes')

        # 获取redis中短信验证码
        sms_code_server_byte = redis_conn.get('sms_%s' % user.mobile)
        sms_code_server = sms_code_server_byte.decode()

        # 判断验证码是否正确
        if sms_code_server!= sms_code:
            # return http.JsonResponse({'code':400,'errmsg':'手机验证码错误'})
            return http.HttpResponseForbidden('短信验证码错误')

        serializer = Serializer(secret_key=settings.SECRET_KEY, expires_in=3600 * 24)

        # 2.包装要加密字典数据
        data = {'user_id': user.id}

        # 3.加密 decode()
        access_token = serializer.dumps(data).decode()

        # get_user_check_token()


        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': 'OK', 'user_id': user.id,'access_token':access_token})

# @csrf_exempt
class CommitPasswordView(View):
    def post(self,request,user_id):

        # 接收参数
        json_dict = json.loads(request.body.decode())
        password = json_dict.get('password')
        password2 = json_dict.get('password2')
        access_token = json_dict.get('access_token')

        # 校验
        try:
            user = Users.objects.get(id=user_id)
        except Users.DoesNotExist:
            return http.HttpResponseForbidden('user模型不存在')

        # 判断两次密码是否一样

        if password==password2:
            user.set_password(password)
            user.save()

        else:
            return http.JsonResponse({'code':RETCODE.SESSIONERR,'errmsg':'两次密码不一致'})


        response = redirect('/login/')
        return response